Running time: 103 minutes. Not rated (mature subject matter). At the Angelika and the Lincoln Plaza.

WERNER Herzog, the great German filmmaker, has long been obsessed with obsession.

His early films concentrate on troubled souls (played by the late Klaus Kinski), like the gentleman in “Fitzcarraldo” who tries to haul a large boat over a mountaintop.

Herzog’s latest, the bizarre “Grizzly Man,” analyzes another obsessive individual, but with a difference: His new hero, Timothy Treadwell, was a real person, not a figment of a screenwriter’s imagination.

Treadwell was a wannabe TV actor from Long Island (his father says he tried out for “Cheers” but lost to Woody Harrelson) who had a thing for bears.